body {
  margin: 0;
  font-family: 'Noto Sans TC', sans-serif;
  color: #333;
  background-color: #f9f9f9;
}

/*---------------------- Header ----------------------*/
header {
  background-color: #8fabe9;
  color: white;
  padding: 1em 0;
}

header .container {
  width: 90%;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.logo-row {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-link {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: white;
}

.logo {
  height: 40px;
}

.company-name {
  font-size: 30px;
  font-weight: bold;
  margin-left: 10px;
  color: white;
  white-space: nowrap;
}

.menu-btn {
  background: none;
  border: none;
  color: white;
  font-size: 32px;
  cursor: pointer;
  margin-left: 16px;
  display: none; /* 預設隱藏，手機顯示 */
}

/*---------------------- Main Nav (PC) ----------------------*/
.main-nav {
  display: flex;
  gap: 10px;
  width: 100%;
  margin-top: 15px;
}

.main-nav a {
  color: white;
  margin-left: 20px;
  text-decoration: none;
  font-size: 18px;
}

/*---------------------- Side Nav (Mobile) ----------------------*/
.side-nav {
  position: fixed;
  top: 0;
  left: -250px;
  width: 220px;
  height: 100vh;
  background: #004080;
  color: white;
  padding-top: 60px;
  display: flex;
  flex-direction: column;
  transition: left 0.3s;
  z-index: 999;
  box-shadow: 2px 0 10px rgba(0,0,0,0.15);
}

.side-nav a {
  color: white;
  padding: 18px 25px;
  text-decoration: none;
  font-size: 18px;
  border-bottom: 1px solid rgba(255,255,255,0.13);
}

.side-nav a:last-child {
  border-bottom: none;
}

.close-btn {
  position: absolute;
  top: 18px;
  right: 20px;
  background: none;
  border: none;
  font-size: 32px;
  color: white;
  cursor: pointer;
}

#nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.25);
  z-index: 998;
}
#nav-overlay.active {
  display: block;
}
.side-nav.active {
  left: 0;
}

/*---------------------- Responsive ----------------------*/
@media (max-width: 900px) {
  header .container {
    flex-direction: column;
    align-items: flex-start;
    padding: 0 10px;
  }
  .logo-row {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    width: 100%;
  }
  .menu-btn {
    display: block;
  }
  .main-nav {
    display: none !important;
  }
  .company-name {
    font-size: 22px;
  }
}

/*---------------------- Hero ----------------------*/
.hero {
  background: url('images/banner.jpg') center/cover no-repeat;
  height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: white;
  padding: 20px;
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
}

.hero-text {
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-size: 40px;
  margin-bottom: 15px;
}

.hero p {
  font-size: 18px;
}

.hero .btn {
  display: inline-block;
  margin-top: 20px;
  padding: 10px 20px;
  background-color: #004080;
  color: white;
  text-decoration: none;
  border-radius: 4px;
}

.hero .btn:hover {
  background-color: #003060;
}

/*---------------------- Intro ----------------------*/
.intro {
  background-color: #fff;
  padding: 60px 20px;
  text-align: center;
}

.intro h2 {
  color: #004080;
  font-size: 28px;
  margin-bottom: 15px;
}

.intro p {
  max-width: 800px;
  margin: 0 auto;
  font-size: 18px;
  line-height: 1.6;
}

/*---------------------- Features ----------------------*/
.features {
  background-color: #f0f8ff;
  padding: 60px 20px;
}

.features .container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.feature-box {
  background-color: #fff;
  border-left: 5px solid #004080;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 1px 5px rgba(0, 0, 0, 0.08);
  text-align: center;
}

.feature-box h3 {
  color: #004080;
  margin-bottom: 10px;
}

/*---------------------- Page Header ----------------------*/
.page-header {
  background-color: #004080;
  color: white;
  padding: 60px 20px;
  text-align: center;
}

/*---------------------- About Content ----------------------*/
.about-content {
  padding: 40px 20px;
  background-color: #fff;
}

.about-content .container {
  max-width: 900px;
  margin: 0 auto;
}

.about-content h2 {
  color: #004080;
  margin-top: 30px;
}

.about-content ul {
  padding-left: 20px;
}

/*---------------------- Services Content ----------------------*/
.services-content {
  background-color: #fff;
  padding: 40px 20px;
}

.services-content .container {
  max-width: 1000px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}

.service-box {
  background-color: #f2f8ff;
  border-left: 5px solid #004080;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

.service-box h2 {
  color: #004080;
  margin-bottom: 10px;
}

/*---------------------- Projects Content ----------------------*/
.projects-content {
  background-color: #fff;
  padding: 40px 20px;
}

.projects-content .container {
  max-width: 1000px;
  margin: 0 auto;
  overflow-x: auto;
}

.projects-content table {
  width: 100%;
  border-collapse: collapse;
  min-width: 600px;
}

.projects-content th,
.projects-content td {
  border: 1px solid #ccc;
  padding: 12px;
  text-align: left;
  font-size: 16px;
}

.projects-content th {
  background-color: #004080;
  color: white;
}

.projects-content tr:nth-child(even) {
  background-color: #f9f9f9;
}

/*---------------------- Contact Content ----------------------*/
.contact-content {
  background-color: #fff;
  padding: 40px 20px;
}

.contact-content .container {
  max-width: 900px;
  margin: 0 auto;
}

.contact-info p {
  margin-bottom: 8px;
}

.contact-map {
  margin-top: 40px;
}

/*---------------------- Footer ----------------------*/
footer {
  background-color: #8fabe9;
  color: white;
  padding: 30px 15px;
  text-align: center;
}

footer .container {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  font-size: 16px;
}

/*---------------------- Extra Responsive for Mobile ----------------------*/
@media (max-width: 900px) {
  .company-name {
    font-size: 22px;
  }
  .hero {
    height: 250px;
    font-size: 16px;
    padding: 10px;
  }
  .hero h1 {
    font-size: 28px;
  }
  .intro h2 {
    font-size: 22px;
  }
  .features .container,
  .services-content .container {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .feature-box,
  .service-box {
    padding: 15px;
    font-size: 15px;
  }
  .projects-content .container {
    padding: 0;
  }
  .projects-content table th,
  .projects-content table td {
    font-size: 14px;
    padding: 8px;
  }
  .about-content .container,
  .contact-content .container,
  footer .container {
    padding: 0 5px;
    font-size: 15px;
  }
  .page-header {
    padding: 30px 10px;
    font-size: 18px;
  }
}

@media (max-width: 600px) {
  .logo {
    height: 32px;
  }
  .company-name {
    font-size: 17px;
  }
  .hero {
    height: 140px;
    padding: 4px;
    font-size: 14px;
  }
  .hero h1 {
    font-size: 18px;
    margin-bottom: 10px;
  }
  .hero p {
    font-size: 13px;
  }
  .hero .btn {
    margin-top: 10px;
    padding: 7px 14px;
    font-size: 15px;
  }
  .intro,
  .features,
  .about-content,
  .services-content,
  .projects-content,
  .contact-content {
    padding: 18px 4px;
  }
  .features .container,
  .services-content .container {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .feature-box,
  .service-box {
    padding: 10px;
    font-size: 14px;
  }
  .projects-content table {
    min-width: 350px;
  }
  .projects-content th,
  .projects-content td {
    font-size: 12px;
    padding: 6px;
  }
  .page-header {
    padding: 15px 4px;
    font-size: 15px;
  }
  footer {
    padding: 18px 4px;
    font-size: 13px;
  }
  footer .container {
    font-size: 13px;
    padding: 0 2px;
  }
}
@media (max-width: 900px) {
  .menu-btn {
    display: block !important;
  }
  .main-nav {
    display: none !important;
  }
}